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I M. HUNGERFORD.

Ore Concentrator.

No. 62,749. Patented March 12, 1867.

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MORGAN HUNGER-FORD, OF SAN FRANCISCO, CALIFORNIA.

Letters Patent N0. 62,749, dated [Jr/rail. 12, 1867.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, l\IORGAN IIUNGERFORD, of the city and county of San Francisco, State of California}.

haveinrented certain new and useful improvemcntsin Concentrators and Amalgamarors for saving metals contained in ores or rock, whether of sulphurets, gold, silver, or copper; and I hereby declare the following description and accompanying drawings are suiliclent to enable any person skilled in the art or science to which it most rcarly appertains to make and use my card invention or improvements without further invention or experiment.

The nature of my invention consists in the employment of a circular disk, with incline sides deviating from its centre or central line to its circumference, with a groove around the periphery, with another rim around the pan, thisrim being provided with stops placed at opposite sides.

Figure 1 represents a top view of my machine, with part of cover removed.

Figure 2, a sectional elevation.

Figure a plan of frame, gear, and centre.

Figure 4, elevation of frame and gear.

The efforts heretofore made to concentrate sulphurets by means of a current of water passing over a convex disk have, so far as I am informed, been unsuccessful, in a measure, owing to the fact, among others, that the sand and debris which are contained in them are carried into the amalgam or quicksilver channels, to be reduced and separated afterwards by a more laborious proccss, or wasted in the effort to free the sulphurets from sand. The

= object of my invention is to provide amachine of such construction as will carry the sand and debris as nearly as possible up the peculiar incline sides of the pan, and out through a central'opeuing, when the metal or sulphurets, by their greater specific gravity, will be carried down the incline sides to the inner groove of the pan, and from thence drawn into the rim surrounding the inner groove at the same angle of inclination as that of the sides of saidpan; and also, should the sand or debris be carrieddown upon the sulphurets around the inner groove, that they may form in a crust, from beneath which they may be drawn into the outer rim or receptacle leaving the sand.

Referring to the drawings, A represents a suitable frame, upon which the driving-shaft and pulley B B are placed. Upon this shaft are two eccentrics, C 0, operating between two lugs on the bottom of the pan. The pan 1) is of circular form, of convex surface, cut in two in form of a semicircle,.with sides dropped one inch from its centre, making the lowest point of depression two inches, presenting upon its central line a ridge or nearly acute angle, gradually declining to its periphery, presenting nearly flat'incline sides. The groove E, with rim which surrounds the disk of the pan, partakcs of the peculiar nature of its surface; consequently the channels decline from the'ridge or elevation through the centre to the lowest point of the declining sides in which the heavy particles of metal are deposited. Above the line of the groove, I place slots or outlets F F, about six inches apart, around the whole circumference, through which the sulphurets are drawn into an outer rim or receptacle, leaving the amalgam in the groove, and the sand and debris above, which latter is compact, or

inform of a crust, to be washed away by the oscillating motion of the machine. The outer rim G is carried below the line of the bottom of the pan, forming a hollow receptacle or rim around the inner rim, at the same elevation and partaking of the same general character as that of the surface of the pan. At opposite sides of the ridge through thepa-n, between the inner and outer rims, I place stops H H, so that the particles of ore and debris will be checked, and, carried backward and forward, and the debris become agitated and brought to the surface to be drawn off through the discharge hole I I in the rim above the heavy particles. The sulphurets and amalgam are discharged from under the outer rim by means of holes J J, leaving the lighter particles to be washed away by water. By this arrangement the sulphuret-s are rendered comparatively clean in shorter time and at much less expense than by other machines new in use. Having thus described my invention, I do not claim a concentrator for saving metals with a convex surface with outlets near the centre of the pan, and circumferential gutter around it; but what I do claim, and desire to secure by Letters Patent, is

1. A pan out in two and dropped about one inch, -so that the lowest depression shall be two inches, more or less, below the ridge or angle of such concentrator, substantially as described and for the purpose set forth.

2. The slots or outlets F F above the line of the groove around the inner rim, as described. 0

o. The-outer rim G, with stops H II; also the discharge holes J J, under the pan, around the said outer rim,

s substantially as described and for the purposeset forth- In witness whereof .I have hereunto set my hand and seal this 9th day of May, A. D. 1866.

' MORGAN HUNGEBFORD. [L. 5.]

Witnesses:

O. W. M. SMIIH, Gus. A. Murmur. 

